4-40UNC3A-1/4 — SCREW,CAP,SOCKET HEAD

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

4-40UNC3A-1/4: SCREW,CAP,SOCKET HEAD.

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include head_style: BUTTON, head_height: 0.051 INCHES MINIMUM AND 0.059 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.201 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN, thread_length: 0.200 INCHES NOMINAL IN, fastener_length: 0.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-351-3515, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS

4-40UNC3A-1/4

NSN: 5305-01-351-3515
FSC: 5305 — Screws
CAGE: 70318 — ALLMETAL SCREW PRODUCTS CORP (USA)

SPECIFICATIONS

head_style	BUTTON
head_height	0.051 INCHES MINIMUM AND 0.059 INCHES MAXIMUM IN
thread_class	2A A
head_diameter	0.201 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN
thread_length	0.200 INCHES NOMINAL IN
fastener_length	0.250 INCHES NOMINAL IN
locking_feature	STRIP THREADS
thread_direction	RIGHT-HAND
width_across_flats	0.0625 INCHES MINIMUM AND 0.0635 INCHES MAXIMUM IN
internal_drive_style	HEXAGON
nominal_thread_diameter	0.112 INCHES IN
thread_quantity_per_inch	40
NSN	5305-01-351-3515

COMPONENT DIAGRAM

KEY FEATURES

•

WIDTH ACROSS FLATS: 0.0625 INCHES MINIMUM AND 0.0635 INCHES MAXIMUM IN

•

HEAD HEIGHT: 0.051 INCHES MINIMUM AND 0.059 INCHES MAXIMUM IN

•

FASTENER LENGTH: 0.250 INCHES NOMINAL IN

•

THREAD LENGTH: 0.200 INCHES NOMINAL IN

•

NOMINAL THREAD DIAMETER: 0.112 INCHES IN

•

HEAD STYLE: BUTTON

•

THREAD DIRECTION: RIGHT-HAND

•

LOCKING FEATURE: STRIP THREADS

TECHNICAL CHARACTERISTICS

WIDTH ACROSS FLATS	0.0625 INCHES MINIMUM AND 0.0635 INCHES MAXIMUM IN
HEAD HEIGHT	0.051 INCHES MINIMUM AND 0.059 INCHES MAXIMUM IN
FASTENER LENGTH	0.250 INCHES NOMINAL IN
THREAD LENGTH	0.200 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER	0.112 INCHES IN
HEAD STYLE	BUTTON
THREAD DIRECTION	RIGHT-HAND
LOCKING FEATURE	STRIP THREADS
INTERNAL DRIVE STYLE	HEXAGON
THREAD CLASS	2A A

OTHER ITEMS IN FSC 5305 — Screws

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831

SUBSTITUTES & CROSS-REFERENCES 1

6481-354120-1Reference document

Same NSN cross-reference

Reference document — Advisory reference — outside the item-of-supply concept

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 4-40UNC3A-1/4?

4-40UNC3A-1/4 is a SCREW,CAP,SOCKET HEAD.

What parts can replace 4-40UNC3A-1/4?

There is 1 known substitute for 4-40UNC3A-1/4: 6481-354120-1. Substitute compatibility should be verified for your specific system.

What is the NSN for 4-40UNC3A-1/4?

4-40UNC3A-1/4 is cataloged in the U.S. Government catalog under NSN 5305-01-351-3515. This indicates validated use in U.S. government and defense supply chains.

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4-40UNC3A-1/4 — SCREW,CAP,SOCKET HEAD

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